This chapter introduces additional features of DELTAE that expand its uses and convenience for the user who is already comfortable with the basics. Here we explain ``free targets" that allow the increased control over the endpoints of DELTAE's iterations and incorporate some basic math functions; active branches that permit simultaneous calculation of side branches and main ducts for complicated models; additional fluid options, including binary gas mixtures; parameter linking so that iterations can be performed while maintaining certain geometric relationships in the model; and several other useful features and tunable parameters.